연속적 능동무릎폄 검사가 뒤넙다리근의 유연성에 미치는 영향

• Published in: 대한물리치료과학회지 Vol. 28; no. 1; pp. 76 - 84
• Main Authors: 임우택, Lim, Woo Taek
• Format: Journal Article
• Language: Korean
• Published: 대한물리치료과학회 01.06.2021
• Subjects: 물리치료학; Joint flexibility; Hamstring muscles; Range of motion; Active knee extension test
• ISSN: 2733-6441; 2733-645X
• DOI: 10.26862/jkpts.2021.06.28.1.76

Background: In clinical practice, active knee extension (AKE) test has been widely used to measure hamstring flexibility. During the AKE test, the knee extension is repeated six times. The first five repetitions are considered as warm-up, and the sixth is used as baseline. In order to accurately measure the subject's inherent flexibility, warm-up trials have been proposed as mentioned above; but currently, the evidence is insufficient. Design: Cross-sectional study. Methods: Forty-three healthy adults participated in this study. The AKE was performed slowly after flexing the hip and knee joints by 90° in a supine position. The knee was extended as far as could be done without causing discomfort or pain. When reaching the end range, knee flexion was performed without stopping. As per standard protocol, the subjects performed the knee extension six times. Results: There was no significant difference between the AKE value in the first trial with those in the other five trials. During the repetitions, the average value in the group with higher flexibility tended to decrease and the Intraclass correlation coefficient gradually decreased. Conclusion: Successive repetitions of the AKE test can misrepresent an individual's inherent hamstring flexibility. In order to avoid a decrease in hamstring flexibility, it is strongly recommended that individuals with high initial hamstring flexibility avoid unnecessary repetitions of the AKE test.